package functii_elementare;

public class Necunoscuta extends Functie{
	public double calcul()
	{
		return x;
	}
	public double calculDerivata()
	{
		return 1;
	}
	public String derivare()
	{
		return "1";
	}
	public String toString()
	{
		return "x"; 
	}

}
